Fixing ResetMasterTracking checkbox binding and giving it a clearer label

Author: StanleyGoldman

src/GitHub.VisualStudio/Views/Dialog/ForkRepositoryExecuteView.xaml

@@ -55,18 +55,18 @@
       </Border>
       <Border Style="{StaticResource ItemBorder}">
         <DockPanel>
-            <CheckBox IsChecked="{Binding AddUpstream}"/>
-            <TextBlock TextWrapping="Wrap">
+          <CheckBox IsChecked="{Binding AddUpstream}"/>
+          <TextBlock TextWrapping="Wrap">
             Add an <Run Style="{DynamicResource {x:Static markdig:Styles.CodeStyleKey}}">upstream</Run> remote pointing to 
           <Hyperlink><Run Text="{Binding SourceRepository.CloneUrl, Mode=OneWay}"/></Hyperlink>
           </TextBlock>
         </DockPanel>
       </Border>
       <Border Style="{StaticResource ItemBorder}">
         <DockPanel>
-          <CheckBox IsChecked="{Binding AddUpstream}"/>
+          <CheckBox IsChecked="{Binding ResetMasterTracking}"/>
           <TextBlock TextWrapping="Wrap">
-            Reset the <Run Style="{DynamicResource {x:Static markdig:Styles.CodeStyleKey}}">master</Run> branch to 
+            Set the <Run Style="{DynamicResource {x:Static markdig:Styles.CodeStyleKey}}">master</Run> branch to track
             <Run Style="{DynamicResource {x:Static markdig:Styles.CodeStyleKey}}">upstream/master</Run>
           </TextBlock>
         </DockPanel>